37 Audits
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DNS Mail BIMI Checker

Security Checker

Validates BIMI for brand authentication in emails

Security
10 credits
Per check
~30 seconds
Average runtime
Active
Status

How it works

Validates BIMI (Brand Indicators for Message Identification) configuration for brand authentication.

What this checker validates

What it checks

This checker validates BIMI (Brand Indicators for Message Identification) configuration for brand authentication. It checks:

  • BIMI Record Presence: Verifies that a TXT record exists at default._bimi.domain

  • Valid BIMI Version: Confirms the record starts with v=BIMI1

  • Record Format: Ensures the record follows the correct BIMI format

The checker performs DNS TXT record lookups and validates BIMI record syntax. Note that BIMI is optional, so missing records result in warnings, not failures.

Output Documentation

Output Documentation

StatusConditionTest LogicDescription
SUCCESSBIMI properly configured- BIMI record exists with valid syntax
- Record starts with v=BIMI1
- Record format is correct
Domain has properly configured BIMI for brand authentication
WARNINGBIMI missing or has issues- No BIMI record found (optional)
- BIMI record exists but malformed
- Record does not start with v=BIMI1
BIMI is optional; missing or malformed records result in warnings
FAILNever occurs- This checker never returns FAIL statusBIMI is optional and never causes failures
ERRORTechnical failure- DNS lookup failed
- HTTP request failed
- Network connectivity issues
- Invalid domain format
Technical error occurred during BIMI validation

Risks and Considerations

Risks of ignoring BIMI configuration issues

If BIMI is missing or misconfigured, the following risks apply:

  • Brand Impersonation: Attackers may impersonate your brand in phishing emails

  • Customer Trust Loss: Recipients may not recognize legitimate emails from your organization

  • Phishing Vulnerability: Lack of brand authentication makes phishing attacks more effective

  • Competitive Disadvantage: Other organizations may appear more trustworthy in email clients

  • Compliance Issues: Some industries require BIMI for brand protection

  • Reputation Damage: Lack of brand authentication may affect email deliverability

  • Customer Confusion: Recipients may be unsure about email authenticity

  • Business Risk: Brand impersonation may lead to financial losses and legal issues

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